Heat-forming Lexan/polycarbonate?

Has anyone here actually done this? Lots of DIY sites say that it is bad to attempt to heat-form because it bubbles up when heated, but a couple industrial sites say it has to be baked at 250 F for (some period of time depending on the material's thickness) to remove the moisture absorbed in it, before heating up to the 375 F forming temp. Anybody really know? There are companies that make stuff out of it by heat-forming it, and they still manage to keep the stuff perfectly clear. ?

Ive had both success and failure at bending .060 polycarbonate. If you let it bet just to the point where it starts to be bendable, there is no problem. If you let it get too hot, you'll get bubbles. I used a heating strip designed for forming acrylic.

This page: http://www.portplastics.com/architect/page...says .093" needs four hours, so .060 would be perhaps 2 - 2.5 hours at 250F? Then up to 375F. I ordered some .060 and .020 sheet. I dunno what I'll drape it on, cardboard with white glue should work at those temps, yes? Paper lights at 451 F...-----And this is for maing a bicycle windshield actually. But hey! I'm working on a scratch-built case!! I just don't use any plastic for it.... aluminum all round. I'll get back on that when the weather gets warm again.